US, UK Seeks To Strengthen Syrian Opposition

Despite the Rebels taking hostages and, to date, refusing to release them, the United States, The United Kingdom, and France have continued support of the Syrian Rebels:

Western training of Syrian rebels is under way in Jordan in an effort to strengthen secular elements in the opposition as a bulwark against Islamic extremism, and to begin building security forces to maintain order in the event of Bashar al-Assad’s fall.

Jordanian security sources say the training effort is led by the US, but involves British and French instructors.

Keep in mind, the Syrian Rebels have vowed to impose sharia law once al-Assad is ousted. This is the "secular elements" the West is trying to strengthen? Syria was already one of the more secular Islamic countries in the Middle East. After Egypt, Libya, and other "Arab spring" nations failed in bring any new freedoms to the citizens, but in fact, resulted in more radical Islamic governments, you would think the West would learn.

So, why have the US and the UK actively participated in overthrowing the more secular Middle East governments only to pave way for radical elements? Why are they so eager to bring Islamists to power?